Accordion



K. A. JAKOBSSON.

ACCORDION.

APPLICATION HLED oer. 7, 1919.

1,375, 156. Patented Apr- 19, 1 21.

' Inventor KAJa/Imbwon',

Ami-nay UNITED STATES KARL AXEL JAKOBSSON, OF STOCKHOLM, SWEDEN, ASSIGNOR TO WILLIAM FARRE, OF CHRISTIANIA, NORWAY.

PATENT @FFICE. I

ACCORDION.

Specification of Letters Patent.

Patented Apr. 19, 1921.

Application filed October 7, 1919. Serial No. 329,036.

To all whom it may concern Be it known that I, KARL A. JAKoBssoN, citizen of Sweden, residing at Sundbyberg, Stockholm, Sweden, have invented certain new and useful Improvements in Accordions, of which the following is a specification.

This invention relates to improvements in key-controlled wind instruments and more particularly to accordions.

The object of the invention is to provide a simple inexpensive chord mechanism whereby a number of the air valves may be simultaneously operated.

WVith the foregoing object outlined and with other objects in view which will appear as the description proceeds, the invention consists in the novel features heroinafter described in detail, illustrated in the accompanying drawing and more particularly pointed out in the appended claim.

Referring to the drawing:

Figure 1 is a vertical sectional view illus trating my improved mechanism.

Fig. 2 is a plan View of the mechanism.

In the drawing 1, 2 and 3 designate the upper or chord keys of an accordion which are designed to control the air valves 4. Each of these air valves is rigidly connected by a bent rod 5 to one of the rock shafts 7. The rock shafts are mounted in parallel relationship in the case 6 and each shaft is provided with an upwardly extending arm 8 which terminates in a vertical portion 9. It will be noted that all of the extensions 9 lie in a single plane in order that they may be operated by the mechanism now described. Located between the keys 1, 2 and 3 and the extensions 9 are rods 10 provided at their rear ends with angular extensions 11, the angular extensions of the uppermost rods 10 being of greater length than the angular extensions of the second and third rows and the angular extensions of the sec 0nd row being of greater length than the angular extensions of the third row.

in the drawing the uppermost rods have thelr extensions 11 of sufficient length to engage and operate four of the extensions 9 so that depression of one of the uppermost keys 1 will contemporaneously operate four of the valves 4.

The extensions 11 of the keys 2 are of a length suflicient to engage three only of the extenslons 9 and in consequence depression of one of the keys 2 will operate but three of the valves 4.

The extensions 11 of the keys 3 are of a length to operate two valves only.

From the foregoing it is believed that the improved mechanism will be readily understood and it is apparent that the present construction will enable the valves and their operating mechanism to be readily reached for the purpose of repair or renewal.

lVhat I claim and desire to secure by Letters-Patent is: i p In an accordion, the combination with a plurality of air valves, of a series of arallel rock-shafts, rods connecting said roc shafts to the valves, an arm fixed to each rockshaft and having an extension, the extensions. of all of said arms lying in the same plane, an upper series of keys provided with rods having angular extensions designed to simultaneously engage a plurality of the arm extensions, and other keys having rods provided with extensions of less length than the extensions of the first mentioned keyrods engaging a diiferent number of the arm extensions than the extensions of the first mentioned keyrods.

In testimony whereof I have affixed my signature in resence of two witnesses.

K RL AXEL JAKOBSSON.

Witnesses:

Orro BRUNING, E. LINDSEY. 

